wownero/src/wallet/wallet2.cpp

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// Copyright (c) 2012-2013 The Cryptonote developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/utility/value_init.hpp>
#include "include_base_utils.h"
using namespace epee;
#include "wallet2.h"
#include "cryptonote_core/cryptonote_format_utils.h"
#include "rpc/core_rpc_server_commands_defs.h"
#include "misc_language.h"
#include "cryptonote_core/cryptonote_basic_impl.h"
#include "common/boost_serialization_helper.h"
#include "profile_tools.h"
#include "crypto/crypto.h"
#include "serialization/binary_utils.h"
#include "cryptonote_protocol/blobdatatype.h"
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using namespace cryptonote;
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namespace
{
void do_prepare_file_names(const std::string& file_path, std::string& keys_file, std::string& wallet_file)
{
keys_file = file_path;
wallet_file = file_path;
boost::system::error_code e;
if(string_tools::get_extension(keys_file) == "keys")
{//provided keys file name
wallet_file = string_tools::cut_off_extension(wallet_file);
}else
{//provided wallet file name
keys_file += ".keys";
}
}
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} //namespace
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namespace tools
{
//----------------------------------------------------------------------------------------------------
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void wallet2::init(const std::string& daemon_address, uint64_t upper_transaction_size_limit)
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{
m_upper_transaction_size_limit = upper_transaction_size_limit;
m_daemon_address = daemon_address;
}
//----------------------------------------------------------------------------------------------------
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void wallet2::process_new_transaction(const cryptonote::transaction& tx, uint64_t height)
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{
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process_unconfirmed(tx);
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std::vector<size_t> outs;
uint64_t tx_money_got_in_outs = 0;
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std::vector<tx_extra_field> tx_extra_fields;
if(!parse_tx_extra(tx.extra, tx_extra_fields))
{
// Extra may only be partially parsed, it's OK if tx_extra_fields contains public key
LOG_PRINT_L0("Transaction extra has unsupported format: " << get_transaction_hash(tx));
}
tx_extra_pub_key pub_key_field;
if(!find_tx_extra_field_by_type(tx_extra_fields, pub_key_field))
{
LOG_PRINT_L0("Public key wasn't found in the transaction extra. Skipping transaction " << get_transaction_hash(tx));
if(0 != m_callback)
m_callback->on_skip_transaction(height, tx);
return;
}
crypto::public_key tx_pub_key = pub_key_field.pub_key;
bool r = lookup_acc_outs(m_account.get_keys(), tx, tx_pub_key, outs, tx_money_got_in_outs);
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THROW_WALLET_EXCEPTION_IF(!r, error::acc_outs_lookup_error, tx, tx_pub_key, m_account.get_keys());
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if(!outs.empty() && tx_money_got_in_outs)
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{
//good news - got money! take care about it
//usually we have only one transfer for user in transaction
cryptonote::COMMAND_RPC_GET_TX_GLOBAL_OUTPUTS_INDEXES::request req = AUTO_VAL_INIT(req);
cryptonote::COMMAND_RPC_GET_TX_GLOBAL_OUTPUTS_INDEXES::response res = AUTO_VAL_INIT(res);
req.txid = get_transaction_hash(tx);
bool r = net_utils::invoke_http_bin_remote_command2(m_daemon_address + "/get_o_indexes.bin", req, res, m_http_client, WALLET_RCP_CONNECTION_TIMEOUT);
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THROW_WALLET_EXCEPTION_IF(!r, error::no_connection_to_daemon, "get_o_indexes.bin");
THROW_WALLET_EXCEPTION_IF(res.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "get_o_indexes.bin");
THROW_WALLET_EXCEPTION_IF(res.status != CORE_RPC_STATUS_OK, error::get_out_indices_error, res.status);
THROW_WALLET_EXCEPTION_IF(res.o_indexes.size() != tx.vout.size(), error::wallet_internal_error,
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"transactions outputs size=" + std::to_string(tx.vout.size()) +
" not match with COMMAND_RPC_GET_TX_GLOBAL_OUTPUTS_INDEXES response size=" + std::to_string(res.o_indexes.size()));
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BOOST_FOREACH(size_t o, outs)
{
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THROW_WALLET_EXCEPTION_IF(tx.vout.size() <= o, error::wallet_internal_error, "wrong out in transaction: internal index=" +
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std::to_string(o) + ", total_outs=" + std::to_string(tx.vout.size()));
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m_transfers.push_back(boost::value_initialized<transfer_details>());
transfer_details& td = m_transfers.back();
td.m_block_height = height;
td.m_internal_output_index = o;
td.m_global_output_index = res.o_indexes[o];
td.m_tx = tx;
td.m_spent = false;
cryptonote::keypair in_ephemeral;
cryptonote::generate_key_image_helper(m_account.get_keys(), tx_pub_key, o, in_ephemeral, td.m_key_image);
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THROW_WALLET_EXCEPTION_IF(in_ephemeral.pub != boost::get<cryptonote::txout_to_key>(tx.vout[o].target).key,
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error::wallet_internal_error, "key_image generated ephemeral public key not matched with output_key");
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m_key_images[td.m_key_image] = m_transfers.size()-1;
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LOG_PRINT_L0("Received money: " << print_money(td.amount()) << ", with tx: " << get_transaction_hash(tx));
if (0 != m_callback)
m_callback->on_money_received(height, td.m_tx, td.m_internal_output_index);
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}
}
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uint64_t tx_money_spent_in_ins = 0;
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// check all outputs for spending (compare key images)
BOOST_FOREACH(auto& in, tx.vin)
{
if(in.type() != typeid(cryptonote::txin_to_key))
continue;
auto it = m_key_images.find(boost::get<cryptonote::txin_to_key>(in).k_image);
if(it != m_key_images.end())
{
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LOG_PRINT_L0("Spent money: " << print_money(boost::get<cryptonote::txin_to_key>(in).amount) << ", with tx: " << get_transaction_hash(tx));
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tx_money_spent_in_ins += boost::get<cryptonote::txin_to_key>(in).amount;
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transfer_details& td = m_transfers[it->second];
td.m_spent = true;
if (0 != m_callback)
m_callback->on_money_spent(height, td.m_tx, td.m_internal_output_index, tx);
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}
}
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tx_extra_nonce extra_nonce;
if (find_tx_extra_field_by_type(tx_extra_fields, extra_nonce))
{
crypto::hash payment_id;
if(get_payment_id_from_tx_extra_nonce(extra_nonce.nonce, payment_id))
{
uint64_t received = (tx_money_spent_in_ins < tx_money_got_in_outs) ? tx_money_got_in_outs - tx_money_spent_in_ins : 0;
if (0 < received && null_hash != payment_id)
{
payment_details payment;
payment.m_tx_hash = cryptonote::get_transaction_hash(tx);
payment.m_amount = received;
payment.m_block_height = height;
payment.m_unlock_time = tx.unlock_time;
m_payments.emplace(payment_id, payment);
LOG_PRINT_L2("Payment found: " << payment_id << " / " << payment.m_tx_hash << " / " << payment.m_amount);
}
}
}
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}
//----------------------------------------------------------------------------------------------------
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void wallet2::process_unconfirmed(const cryptonote::transaction& tx)
{
auto unconf_it = m_unconfirmed_txs.find(get_transaction_hash(tx));
if(unconf_it != m_unconfirmed_txs.end())
m_unconfirmed_txs.erase(unconf_it);
}
//----------------------------------------------------------------------------------------------------
void wallet2::process_new_blockchain_entry(const cryptonote::block& b, cryptonote::block_complete_entry& bche, crypto::hash& bl_id, uint64_t height)
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{
//handle transactions from new block
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THROW_WALLET_EXCEPTION_IF(height != m_blockchain.size(), error::wallet_internal_error,
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"current_index=" + std::to_string(height) + ", m_blockchain.size()=" + std::to_string(m_blockchain.size()));
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//optimization: seeking only for blocks that are not older then the wallet creation time plus 1 day. 1 day is for possible user incorrect time setup
if(b.timestamp + 60*60*24 > m_account.get_createtime())
{
TIME_MEASURE_START(miner_tx_handle_time);
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process_new_transaction(b.miner_tx, height);
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TIME_MEASURE_FINISH(miner_tx_handle_time);
TIME_MEASURE_START(txs_handle_time);
BOOST_FOREACH(auto& txblob, bche.txs)
{
cryptonote::transaction tx;
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bool r = parse_and_validate_tx_from_blob(txblob, tx);
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THROW_WALLET_EXCEPTION_IF(!r, error::tx_parse_error, txblob);
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process_new_transaction(tx, height);
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}
TIME_MEASURE_FINISH(txs_handle_time);
LOG_PRINT_L2("Processed block: " << bl_id << ", height " << height << ", " << miner_tx_handle_time + txs_handle_time << "(" << miner_tx_handle_time << "/" << txs_handle_time <<")ms");
}else
{
LOG_PRINT_L2( "Skipped block by timestamp, height: " << height << ", block time " << b.timestamp << ", account time " << m_account.get_createtime());
}
m_blockchain.push_back(bl_id);
++m_local_bc_height;
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if (0 != m_callback)
m_callback->on_new_block(height, b);
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}
//----------------------------------------------------------------------------------------------------
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void wallet2::get_short_chain_history(std::list<crypto::hash>& ids)
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{
size_t i = 0;
size_t current_multiplier = 1;
size_t sz = m_blockchain.size();
if(!sz)
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return;
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size_t current_back_offset = 1;
bool genesis_included = false;
while(current_back_offset < sz)
{
ids.push_back(m_blockchain[sz-current_back_offset]);
if(sz-current_back_offset == 0)
genesis_included = true;
if(i < 10)
{
++current_back_offset;
}else
{
current_back_offset += current_multiplier *= 2;
}
++i;
}
if(!genesis_included)
ids.push_back(m_blockchain[0]);
}
//----------------------------------------------------------------------------------------------------
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void wallet2::pull_blocks(size_t& blocks_added)
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{
blocks_added = 0;
cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::request req = AUTO_VAL_INIT(req);
cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::response res = AUTO_VAL_INIT(res);
get_short_chain_history(req.block_ids);
bool r = net_utils::invoke_http_bin_remote_command2(m_daemon_address + "/getblocks.bin", req, res, m_http_client, WALLET_RCP_CONNECTION_TIMEOUT);
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THROW_WALLET_EXCEPTION_IF(!r, error::no_connection_to_daemon, "getblocks.bin");
THROW_WALLET_EXCEPTION_IF(res.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "getblocks.bin");
THROW_WALLET_EXCEPTION_IF(res.status != CORE_RPC_STATUS_OK, error::get_blocks_error, res.status);
THROW_WALLET_EXCEPTION_IF(m_blockchain.size() <= res.start_height, error::wallet_internal_error,
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"wrong daemon response: m_start_height=" + std::to_string(res.start_height) +
" not less than local blockchain size=" + std::to_string(m_blockchain.size()));
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size_t current_index = res.start_height;
BOOST_FOREACH(auto& bl_entry, res.blocks)
{
cryptonote::block bl;
r = cryptonote::parse_and_validate_block_from_blob(bl_entry.block, bl);
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THROW_WALLET_EXCEPTION_IF(!r, error::block_parse_error, bl_entry.block);
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crypto::hash bl_id = get_block_hash(bl);
if(current_index >= m_blockchain.size())
{
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process_new_blockchain_entry(bl, bl_entry, bl_id, current_index);
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++blocks_added;
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}
else if(bl_id != m_blockchain[current_index])
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{
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//split detected here !!!
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THROW_WALLET_EXCEPTION_IF(current_index == res.start_height, error::wallet_internal_error,
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"wrong daemon response: split starts from the first block in response " + string_tools::pod_to_hex(bl_id) +
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" (height " + std::to_string(res.start_height) + "), local block id at this height: " +
string_tools::pod_to_hex(m_blockchain[current_index]));
detach_blockchain(current_index);
process_new_blockchain_entry(bl, bl_entry, bl_id, current_index);
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}
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else
{
LOG_PRINT_L2("Block is already in blockchain: " << string_tools::pod_to_hex(bl_id));
}
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++current_index;
}
}
//----------------------------------------------------------------------------------------------------
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void wallet2::refresh()
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{
size_t blocks_fetched = 0;
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refresh(blocks_fetched);
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}
//----------------------------------------------------------------------------------------------------
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void wallet2::refresh(size_t & blocks_fetched)
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{
bool received_money = false;
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refresh(blocks_fetched, received_money);
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}
//----------------------------------------------------------------------------------------------------
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void wallet2::refresh(size_t & blocks_fetched, bool& received_money)
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{
received_money = false;
blocks_fetched = 0;
size_t added_blocks = 0;
size_t try_count = 0;
crypto::hash last_tx_hash_id = m_transfers.size() ? get_transaction_hash(m_transfers.back().m_tx) : null_hash;
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while(m_run.load(std::memory_order_relaxed))
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{
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try
{
pull_blocks(added_blocks);
blocks_fetched += added_blocks;
if(!added_blocks)
break;
}
catch (const std::exception&)
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{
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blocks_fetched += added_blocks;
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if(try_count < 3)
{
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LOG_PRINT_L1("Another try pull_blocks (try_count=" << try_count << ")...");
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++try_count;
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}
else
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{
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LOG_ERROR("pull_blocks failed, try_count=" << try_count);
throw;
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}
}
}
if(last_tx_hash_id != (m_transfers.size() ? get_transaction_hash(m_transfers.back().m_tx) : null_hash))
received_money = true;
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LOG_PRINT_L1("Refresh done, blocks received: " << blocks_fetched << ", balance: " << print_money(balance()) << ", unlocked: " << print_money(unlocked_balance()));
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}
//----------------------------------------------------------------------------------------------------
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bool wallet2::refresh(size_t & blocks_fetched, bool& received_money, bool& ok)
{
try
{
refresh(blocks_fetched, received_money);
ok = true;
}
catch (...)
{
ok = false;
}
return ok;
}
//----------------------------------------------------------------------------------------------------
void wallet2::detach_blockchain(uint64_t height)
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{
LOG_PRINT_L0("Detaching blockchain on height " << height);
size_t transfers_detached = 0;
auto it = std::find_if(m_transfers.begin(), m_transfers.end(), [&](const transfer_details& td){return td.m_block_height >= height;});
size_t i_start = it - m_transfers.begin();
for(size_t i = i_start; i!= m_transfers.size();i++)
{
auto it_ki = m_key_images.find(m_transfers[i].m_key_image);
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THROW_WALLET_EXCEPTION_IF(it_ki == m_key_images.end(), error::wallet_internal_error, "key image not found");
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m_key_images.erase(it_ki);
++transfers_detached;
}
m_transfers.erase(it, m_transfers.end());
size_t blocks_detached = m_blockchain.end() - (m_blockchain.begin()+height);
m_blockchain.erase(m_blockchain.begin()+height, m_blockchain.end());
m_local_bc_height -= blocks_detached;
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for (auto it = m_payments.begin(); it != m_payments.end(); )
{
if(height <= it->second.m_block_height)
it = m_payments.erase(it);
else
++it;
}
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LOG_PRINT_L0("Detached blockchain on height " << height << ", transfers detached " << transfers_detached << ", blocks detached " << blocks_detached);
}
//----------------------------------------------------------------------------------------------------
bool wallet2::deinit()
{
return true;
}
//----------------------------------------------------------------------------------------------------
bool wallet2::clear()
{
m_blockchain.clear();
m_transfers.clear();
cryptonote::block b;
cryptonote::generate_genesis_block(b);
m_blockchain.push_back(get_block_hash(b));
m_local_bc_height = 1;
return true;
}
//----------------------------------------------------------------------------------------------------
bool wallet2::store_keys(const std::string& keys_file_name, const std::string& password)
{
std::string account_data;
bool r = epee::serialization::store_t_to_binary(m_account, account_data);
CHECK_AND_ASSERT_MES(r, false, "failed to serialize wallet keys");
wallet2::keys_file_data keys_file_data = boost::value_initialized<wallet2::keys_file_data>();
crypto::chacha8_key key;
crypto::generate_chacha8_key(password, key);
std::string cipher;
cipher.resize(account_data.size());
keys_file_data.iv = crypto::rand<crypto::chacha8_iv>();
crypto::chacha8(account_data.data(), account_data.size(), key, keys_file_data.iv, &cipher[0]);
keys_file_data.account_data = cipher;
std::string buf;
r = ::serialization::dump_binary(keys_file_data, buf);
r = r && epee::file_io_utils::save_string_to_file(keys_file_name, buf); //and never touch wallet_keys_file again, only read
CHECK_AND_ASSERT_MES(r, false, "failed to generate wallet keys file " << keys_file_name);
return true;
}
//----------------------------------------------------------------------------------------------------
namespace
{
bool verify_keys(const crypto::secret_key& sec, const crypto::public_key& expected_pub)
{
crypto::public_key pub;
bool r = crypto::secret_key_to_public_key(sec, pub);
return r && expected_pub == pub;
}
}
//----------------------------------------------------------------------------------------------------
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void wallet2::load_keys(const std::string& keys_file_name, const std::string& password)
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{
wallet2::keys_file_data keys_file_data;
std::string buf;
bool r = epee::file_io_utils::load_file_to_string(keys_file_name, buf);
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THROW_WALLET_EXCEPTION_IF(!r, error::file_read_error, keys_file_name);
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r = ::serialization::parse_binary(buf, keys_file_data);
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THROW_WALLET_EXCEPTION_IF(!r, error::wallet_internal_error, "internal error: failed to deserialize \"" + keys_file_name + '\"');
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crypto::chacha8_key key;
crypto::generate_chacha8_key(password, key);
std::string account_data;
account_data.resize(keys_file_data.account_data.size());
crypto::chacha8(keys_file_data.account_data.data(), keys_file_data.account_data.size(), key, keys_file_data.iv, &account_data[0]);
const cryptonote::account_keys& keys = m_account.get_keys();
r = epee::serialization::load_t_from_binary(m_account, account_data);
r = r && verify_keys(keys.m_view_secret_key, keys.m_account_address.m_view_public_key);
r = r && verify_keys(keys.m_spend_secret_key, keys.m_account_address.m_spend_public_key);
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THROW_WALLET_EXCEPTION_IF(!r, error::invalid_password);
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}
//----------------------------------------------------------------------------------------------------
crypto::secret_key wallet2::generate(const std::string& wallet_, const std::string& password, const crypto::secret_key& recovery_param, bool recover, bool two_random)
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{
clear();
prepare_file_names(wallet_);
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boost::system::error_code ignored_ec;
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THROW_WALLET_EXCEPTION_IF(boost::filesystem::exists(m_wallet_file, ignored_ec), error::file_exists, m_wallet_file);
THROW_WALLET_EXCEPTION_IF(boost::filesystem::exists(m_keys_file, ignored_ec), error::file_exists, m_keys_file);
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crypto::secret_key retval = m_account.generate(recovery_param, recover, two_random);
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m_account_public_address = m_account.get_keys().m_account_address;
bool r = store_keys(m_keys_file, password);
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THROW_WALLET_EXCEPTION_IF(!r, error::file_save_error, m_keys_file);
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r = file_io_utils::save_string_to_file(m_wallet_file + ".address.txt", m_account.get_public_address_str());
if(!r) LOG_PRINT_RED_L0("String with address text not saved");
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store();
return retval;
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}
//----------------------------------------------------------------------------------------------------
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void wallet2::wallet_exists(const std::string& file_path, bool& keys_file_exists, bool& wallet_file_exists)
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{
std::string keys_file, wallet_file;
do_prepare_file_names(file_path, keys_file, wallet_file);
boost::system::error_code ignore;
keys_file_exists = boost::filesystem::exists(keys_file, ignore);
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wallet_file_exists = boost::filesystem::exists(wallet_file, ignore);
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}
//----------------------------------------------------------------------------------------------------
bool wallet2::parse_payment_id(const std::string& payment_id_str, crypto::hash& payment_id)
{
cryptonote::blobdata payment_id_data;
if(!epee::string_tools::parse_hexstr_to_binbuff(payment_id_str, payment_id_data))
return false;
if(sizeof(crypto::hash) != payment_id_data.size())
return false;
payment_id = *reinterpret_cast<const crypto::hash*>(payment_id_data.data());
return true;
}
//----------------------------------------------------------------------------------------------------
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bool wallet2::prepare_file_names(const std::string& file_path)
{
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do_prepare_file_names(file_path, m_keys_file, m_wallet_file);
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return true;
}
//----------------------------------------------------------------------------------------------------
bool wallet2::check_connection()
{
if(m_http_client.is_connected())
return true;
net_utils::http::url_content u;
net_utils::parse_url(m_daemon_address, u);
if(!u.port)
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u.port = RPC_DEFAULT_PORT;
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return m_http_client.connect(u.host, std::to_string(u.port), WALLET_RCP_CONNECTION_TIMEOUT);
}
//----------------------------------------------------------------------------------------------------
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void wallet2::load(const std::string& wallet_, const std::string& password)
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{
clear();
prepare_file_names(wallet_);
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boost::system::error_code e;
bool exists = boost::filesystem::exists(m_keys_file, e);
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THROW_WALLET_EXCEPTION_IF(e || !exists, error::file_not_found, m_keys_file);
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load_keys(m_keys_file, password);
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LOG_PRINT_L0("Loaded wallet keys file, with public address: " << m_account.get_public_address_str());
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//keys loaded ok!
//try to load wallet file. but even if we failed, it is not big problem
if(!boost::filesystem::exists(m_wallet_file, e) || e)
{
LOG_PRINT_L0("file not found: " << m_wallet_file << ", starting with empty blockchain");
m_account_public_address = m_account.get_keys().m_account_address;
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return;
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}
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bool r = tools::unserialize_obj_from_file(*this, m_wallet_file);
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THROW_WALLET_EXCEPTION_IF(!r, error::file_read_error, m_wallet_file);
THROW_WALLET_EXCEPTION_IF(
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m_account_public_address.m_spend_public_key != m_account.get_keys().m_account_address.m_spend_public_key ||
m_account_public_address.m_view_public_key != m_account.get_keys().m_account_address.m_view_public_key,
error::wallet_files_doesnt_correspond, m_keys_file, m_wallet_file);
if(m_blockchain.empty())
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{
cryptonote::block b;
cryptonote::generate_genesis_block(b);
m_blockchain.push_back(get_block_hash(b));
}
m_local_bc_height = m_blockchain.size();
}
//----------------------------------------------------------------------------------------------------
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void wallet2::store()
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{
bool r = tools::serialize_obj_to_file(*this, m_wallet_file);
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THROW_WALLET_EXCEPTION_IF(!r, error::file_save_error, m_wallet_file);
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}
//----------------------------------------------------------------------------------------------------
uint64_t wallet2::unlocked_balance()
{
uint64_t amount = 0;
BOOST_FOREACH(transfer_details& td, m_transfers)
if(!td.m_spent && is_transfer_unlocked(td))
amount += td.amount();
return amount;
}
//----------------------------------------------------------------------------------------------------
uint64_t wallet2::balance()
{
uint64_t amount = 0;
BOOST_FOREACH(auto& td, m_transfers)
if(!td.m_spent)
amount += td.amount();
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BOOST_FOREACH(auto& utx, m_unconfirmed_txs)
amount+= utx.second.m_change;
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return amount;
}
//----------------------------------------------------------------------------------------------------
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void wallet2::get_transfers(wallet2::transfer_container& incoming_transfers) const
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{
incoming_transfers = m_transfers;
}
//----------------------------------------------------------------------------------------------------
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void wallet2::get_payments(const crypto::hash& payment_id, std::list<wallet2::payment_details>& payments) const
{
auto range = m_payments.equal_range(payment_id);
std::for_each(range.first, range.second, [&payments](const payment_container::value_type& x) {
payments.push_back(x.second);
});
}
//----------------------------------------------------------------------------------------------------
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bool wallet2::is_transfer_unlocked(const transfer_details& td) const
{
if(!is_tx_spendtime_unlocked(td.m_tx.unlock_time))
return false;
if(td.m_block_height + DEFAULT_TX_SPENDABLE_AGE > m_blockchain.size())
return false;
return true;
}
//----------------------------------------------------------------------------------------------------
bool wallet2::is_tx_spendtime_unlocked(uint64_t unlock_time) const
{
if(unlock_time < CRYPTONOTE_MAX_BLOCK_NUMBER)
{
//interpret as block index
if(m_blockchain.size()-1 + CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_BLOCKS >= unlock_time)
return true;
else
return false;
}else
{
//interpret as time
uint64_t current_time = static_cast<uint64_t>(time(NULL));
if(current_time + CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_SECONDS >= unlock_time)
return true;
else
return false;
}
return false;
}
//----------------------------------------------------------------------------------------------------
namespace
{
template<typename T>
T pop_random_value(std::vector<T>& vec)
{
CHECK_AND_ASSERT_MES(!vec.empty(), T(), "Vector must be non-empty");
size_t idx = crypto::rand<size_t>() % vec.size();
T res = vec[idx];
if (idx + 1 != vec.size())
{
vec[idx] = vec.back();
}
vec.resize(vec.size() - 1);
return res;
}
}
//----------------------------------------------------------------------------------------------------
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// Select random input sources for transaction.
// returns:
// direct return: amount of money found
// modified reference: selected_transfers, a list of iterators/indices of input sources
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uint64_t wallet2::select_transfers(uint64_t needed_money, bool add_dust, uint64_t dust, std::list<transfer_container::iterator>& selected_transfers)
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{
std::vector<size_t> unused_transfers_indices;
std::vector<size_t> unused_dust_indices;
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// aggregate sources available for transfers
// if dust needed, take dust from only one source (so require source has at least dust amount)
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for (size_t i = 0; i < m_transfers.size(); ++i)
{
const transfer_details& td = m_transfers[i];
if (!td.m_spent && is_transfer_unlocked(td))
{
if (dust < td.amount())
unused_transfers_indices.push_back(i);
else
unused_dust_indices.push_back(i);
}
}
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bool select_one_dust = add_dust && !unused_dust_indices.empty();
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uint64_t found_money = 0;
while (found_money < needed_money && (!unused_transfers_indices.empty() || !unused_dust_indices.empty()))
{
size_t idx;
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if (select_one_dust)
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{
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idx = pop_random_value(unused_dust_indices);
select_one_dust = false;
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}
else
{
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idx = !unused_transfers_indices.empty() ? pop_random_value(unused_transfers_indices) : pop_random_value(unused_dust_indices);
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}
transfer_container::iterator it = m_transfers.begin() + idx;
selected_transfers.push_back(it);
found_money += it->amount();
}
return found_money;
}
//----------------------------------------------------------------------------------------------------
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void wallet2::add_unconfirmed_tx(const cryptonote::transaction& tx, uint64_t change_amount)
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{
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unconfirmed_transfer_details& utd = m_unconfirmed_txs[cryptonote::get_transaction_hash(tx)];
utd.m_change = change_amount;
utd.m_sent_time = time(NULL);
utd.m_tx = tx;
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}
//----------------------------------------------------------------------------------------------------
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void wallet2::transfer(const std::vector<cryptonote::tx_destination_entry>& dsts, size_t fake_outputs_count,
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uint64_t unlock_time, uint64_t fee, const std::vector<uint8_t>& extra, cryptonote::transaction& tx)
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{
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transfer(dsts, fake_outputs_count, unlock_time, fee, extra, detail::digit_split_strategy, tx_dust_policy(fee), tx);
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}
//----------------------------------------------------------------------------------------------------
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void wallet2::transfer(const std::vector<cryptonote::tx_destination_entry>& dsts, size_t fake_outputs_count,
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uint64_t unlock_time, uint64_t fee, const std::vector<uint8_t>& extra)
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{
cryptonote::transaction tx;
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transfer(dsts, fake_outputs_count, unlock_time, fee, extra, tx);
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}
//----------------------------------------------------------------------------------------------------
}